Hollow body forming mold and hollow body forming method

Abstract

A hollow body forming mold includes left and right half molds, a bottom of the left half mold is provided with a left avoidance slot, a bottom of the right half mold is provided with a right avoidance slot, a left bottom slider is disposed in the left avoidance slot, a right bottom slider is disposed in the right avoidance slot, and the left and right bottom sliders constitute a group of sliders. The mold design resolves a difficult problem that a fabrication hole exists during forming of a hollow body with a built-in component by using an existing conventional process. The hollow body forming method has the advantages of a short forming period, the high production efficiency, good combination between a built-in component and an inner wall of an fuel tank, and the high location stability.

The invention claimed is: 
     
       1. A hollow body forming mold, wherein the forming mold comprises:
 left and right half molds, 
 a left avoidance slot provided in a bottom of the left half mold, 
 a right avoidance slot provide in a bottom of the right half mold, 
 a left bottom slider disposed in the left avoidance slot, and 
 a right bottom slider disposed in the right avoidance slot, 
 wherein the left and right bottom sliders each comprise at least two sliders provided in the bottom of the respective left and right half molds. 
 
     
     
       2. The hollow body forming mold according to  claim 1 , wherein the left and right avoidance slots are symmetrically distributed and have a same width, and the left and right bottom sliders are symmetrically distributed and have a same width. 
     
     
       3. The hollow body forming mold according to  claim 1 , wherein the left or right bottom slider is configured as a bottom pinch line of the left or right half mold, and there is only one left or right avoidance slot. 
     
     
       4. The hollow body forming mold according to  claim 1 , wherein there is at least one left bottom slider and at least one right bottom slider, and only one left bottom slider and one right bottom slider is configured as a bottom pinch line, the group of sliders is referred to as a first bottom slider, and any further slider groups can be arranged below the first bottom slider. 
     
     
       5. The hollow body forming mold according to  claim 1 , wherein the left and right bottom sliders are respectively connected to the left and right half molds of the mold by using a driving apparatus, and the driving apparatus is usually any one of conventional drives such as a hydraulic cylinder, a pneumatic cylinder, and a servo motor.